Abstract:
A (3R)-amino-(4R)-aryl piperidine compound is provided to inhibit generation of beta-amyloid proteins damaging neurons by inhibiting the activity of beta-secretase(BACE), thereby being effectively used for preventing or treating Alzheimer's disease. A (3R)-amino-(4R)-aryl piperidine compound is represented by a formula(I), wherein R^1 is -(CH)n-Ar, -(CH)n-CO-Ar, -(CH)n-SO2-Ar, or -(CH)n-CO-NH-Ar(where n is an integer from 0 to 3, Ar is a group represented by the structural formula(1) or (2); R^2 is H or halogen substituted or unsubstituted phenyl; and R^3 is H, -CO-R^6, -SO2-R^7, -CO-(CH2)m-R^8, -CO-NH-(CH2)m-R^9, -COO-(CH2)m-R^10, -CO-N(R^11)-(CH2)m-COO-R^12, -CO-NH-C(R^13))(R^14)-(CH2)m-COO-R^15 or -CO-C(R^16)(R^17)-NH-COO-(CH2)m-R^18(where each R^6 to R^18 is H, halogen, hydroxy or C1-6 alkyl which may be substituted or unsubstituted by C1-3 alkoxy, C1-3 alkylsulfonyl or the Ar same as defined above the R^1 and m is an integer from 0 to 2). In the structural formula(1) or (2), each Y^1 and Y^2 is independently H, phenyl, phenoxy, C1-3 alkoxy or -CO-N(R^4)R^5(wherein each R^4 and R^5 is independently C1-3 alkyl). A pharmaceutical composition for preventing or treating Alzheimer's disease or Down's syndrome comprises the compound of the formula(1) or a pharmaceutically acceptable salt thereof as an effective ingredient.
Abstract:
본 발명은 다음 화학식 1로 표시되는 후퍼진(huperzine) B 유도체와 이의 제조방법에 관한 것으로서, 더욱 상세하게는 다음 화학식 2로 표시되는 카르복실산 화합물을 출발물질로 사용하고, C5 위치의 카르복실기를 아민화 및 N -알켄일화하여 다음 화학식 4로 표시되는 화합물을 반응 중간체로 합성한 후에, 이 중간체 화합물을 복분해반응(Ring Closing Metathesis, RCM)한 후에 메틸보호기를 제거하는 일련의 제조과정을 거쳐 합성하게 되는, 다음 화학식 1로 표시되는 후퍼진 B 유도체와 이의 제조방법에 관한 것이다. 본 발명에 따른 상기 화학식 1로 표시되는 화합물은 치매치료 효과가 있는 것으로 잘 알려져 있는 후퍼진 B 화합물의 유도체로서 화합물 그 자체의 의약적 활성이 기대된다.
Abstract:
본 발명은 우수한 항산화 활성을 갖는 페닐아미딘 유도체 및 이를 포함하는 약학적 조성물에 관한 것으로, 더욱 구체적으로 하기 화학식 1로 표시되는 페닐아미딘 유도체는 종래 항산화제 화합물에 비해 항산화 활성이 우수할 뿐만 아니라 독성이 적어 노화 방지제, 암, 당뇨병 및 간질의 치료제, 그리고 치매, 파킨스씨 병, 뇌졸중 및 헌팅톤의 신경퇴행성 질환 치료제로 유용하게 사용될 수 있다. 화학식 1
Abstract:
PURPOSE: Provided is a quinone compound having excellent antioxidant activity, which can be used for preventing aging and curing cancer, diabetes, epilepsy, imbecility, Parkinson's disease, and etc. CONSTITUTION: The quinone compound is represented by the formula 1 and produced from a compound represented by the formula 3, wherein R1 and R2 are independently methyl or methoxy or R1 and R2 are connectively -CH=CH-CH=CH-, R3 is -NH-(CH2)m-R5, -CO2R6, -OH, and etc., R5 is methyl, phenyl, benzyl, and etc., R6 is hydrogen atom or C1-C4 alkyl, X is CH2 or C=O, and n and m are each 0 or an integer of 1-10.
Abstract:
PURPOSE: A method of preparing a piperazine derivative substituted by 3,5-dialkoxy-4-hydroxyphenyl group is provided. The piperazine derivative have antioxidant and anticancer activities as well as is used for treatment of diabetes, epilepsy, stroke, Parkinson's disease, and other neurodegenerative disorders. CONSTITUTION: A piperazine derivative(formula 1) substituted by 3,5-dialkoxy-4-hydroxyphenyl group, and pharmaceutically acceptable salts thereof have improved anti-oxidation activity, compared to the usual antioxidant compounds. In the formula(1), R is hydrogen, or alkyl group containing saturated or unsaturated carbon of C1-C15, X is alkyl group of C1-C3, -CH=CHC(O)- or -CH2CH2C(O)-, and Y is hydrogen, halogen, hydroxy group, amino group, alkyl group of C1-C5, alkoxy group of C1-C5, or phenyl group.
Abstract:
PURPOSE: A new thiazole derivative obtained by using amide as a starting material is provided which has a strong antibacterial effect on plant pathogenic bacteria with a small amount, for example Pyricularia oryzae Cavera, Rhizoctonia SolaniAG-1, Botrytis cinerea KCI, Phytophthora infestans or the like. CONSTITUTION: Thioamide(formula II) is dissolved in dichloroethane, agitated with dichloroacetone at room temperature for 48 to 72 hr in the presence of a base and then dehydrated to produce chloromethyl thiazole(formula III). A chlorine atom of the chloromethyl thiazole is substituted to an iodine atom by use of sodium iodide and then reacted with 2-(2-hydroxyphenyl)-3-methoxy acrylic acid methylester(formula IV)(in case of A=C) or 2-methoxyimino-(2-hydroxyphenyl)-acetic acid methylester(formula IV)(in case of A=N) to produce a thiazole derivative(formula I).